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Unformatted text preview: de e de
ff i g, e c.)
N add ei ( a ia i if di c e) hi ic e [Fig. 10.2 in Boone 1992, p. 307] A i e a he a ica a a i h
ha if e' i c e a ia i i
i ai i
e he e
a gi a a e i di i i hi g, i reduces i i
fi e : a e f
()
a e f high
( ) a e age e
ha a e f hei a e age (i.e., [V( ) + V( )]/2 < V[( + )/2]) [stud the
graph carefull to understand this point -- it's not obvious!]
B
i he i a i i e e ed he
a gi a a e i acce e a i g (i.e., he c e i be di g
a d ): he a iab e
c e ae
e a ab e ha
ab e e / a e ea , h fa
- ee i g ch ice
beha i (Thi i c
e -i i i e, b ea ie
g a if
hi
f ha a a i g e
e be f 500 ca a da f a ee [= i e dea h] a ga b e i h e a cha ce
e
1,000 ca /da ; c ea , he be cha ce f
i i gi
a e he ga b e! ) ig d efe : a
f ge i g Ecological Conditions Favoring Dela ed Reciprocit
S ha d e a Acc di g
(i.e., a d f hi ha e d i h eci ci ? ec gica he , i e a : gi e di i i hi g fi e
a d -be di g c e), i ( a ia i i
c e) ca courses.washington.edu/anth457/reciproc.htm e
a e eci f dc
ci e i
ada i e
3/8 1/15/12 Reciprocit & Risk To see why, consider a simple little scenario, involving a population of two individuals (I said
"simple...
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